Check for new versions after start.

After LrMediaWiki is loaded, GitHub is checked for new versions if the
user enabled that setting. To parse the response of the GitHub API,
a third-party library is used for JSON parsing (JSON.lua). As the GitHub
API query for the latest release only returns non-pre-release versions,
all releases are queried and the first one is considered the latest.

 - create MediaWikiInit that queries the new version and shows a
   message (if necessary)
 - add MediaWikiInit to Info so that it is run after LrMediaWiki is
   loaded
 - add ‘Check version’ setting to the configuration
 - refactor MediaWikiApi and create performHttpRequest as a generic
   HTTP request method
 - add MediaWikiApi.getCurrentPluginVersion to query the GitHub API

Fix #44.

7 files changed, 1171 insertions, 17 deletions

diff --git a/mediawiki.lrdevplugin/Info.lua b/mediawiki.lrdevplugin/Info.lua
index cbfa8c6..479385e 100755
--- a/mediawiki.lrdevplugin/Info.lua
+++ b/mediawiki.lrdevplugin/Info.lua
@@ -14,6 +14,8 @@ return {
 	LrToolkitIdentifier = 'org.ireas.lightroom.mediawiki',

 	LrPluginName = LOC '$$$/LrMediaWiki/PluginName=MediaWiki for Lightroom',

 

+	LrInitPlugin = 'MediaWikiInit.lua',

+

 	LrExportServiceProvider = {

 		title = LOC '$$$/LrMediaWiki/MediaWiki=MediaWiki',

 		file = 'MediaWikiExportServiceProvider.lua',

diff --git a/mediawiki.lrdevplugin/JSON.lua b/mediawiki.lrdevplugin/JSON.lua
new file mode 100644
index 0000000..5f11425
--- /dev/null
+++ b/mediawiki.lrdevplugin/JSON.lua
@@ -0,0 +1,1053 @@
+-- -*- coding: utf-8 -*-
+--
+-- Simple JSON encoding and decoding in pure Lua.
+--
+-- Copyright 2010-2014 Jeffrey Friedl
+-- http://regex.info/blog/
+--
+-- Latest version: http://regex.info/blog/lua/json
+--
+-- This code is released under a Creative Commons CC-BY "Attribution" License:
+-- http://creativecommons.org/licenses/by/3.0/deed.en_US
+--
+-- It can be used for any purpose so long as the copyright notice above,
+-- the web-page links above, and the 'AUTHOR_NOTE' string below are
+-- maintained. Enjoy.
+--
+local VERSION = 20141223.14 -- version history at end of file
+local AUTHOR_NOTE = "-[ JSON.lua package by Jeffrey Friedl (http://regex.info/blog/lua/json) version 20141223.14 ]-"
+
+--
+-- The 'AUTHOR_NOTE' variable exists so that information about the source
+-- of the package is maintained even in compiled versions. It's also
+-- included in OBJDEF below mostly to quiet warnings about unused variables.
+--
+local OBJDEF = {
+   VERSION      = VERSION,
+   AUTHOR_NOTE  = AUTHOR_NOTE,
+}
+
+
+--
+-- Simple JSON encoding and decoding in pure Lua.
+-- http://www.json.org/
+--
+--
+--   JSON = assert(loadfile "JSON.lua")() -- one-time load of the routines
+--
+--   local lua_value = JSON:decode(raw_json_text)
+--
+--   local raw_json_text    = JSON:encode(lua_table_or_value)
+--   local pretty_json_text = JSON:encode_pretty(lua_table_or_value) -- "pretty printed" version for human readability
+--
+--
+--
+-- DECODING (from a JSON string to a Lua table)
+--
+--
+--   JSON = assert(loadfile "JSON.lua")() -- one-time load of the routines
+--
+--   local lua_value = JSON:decode(raw_json_text)
+--
+--   If the JSON text is for an object or an array, e.g.
+--     { "what": "books", "count": 3 }
+--   or
+--     [ "Larry", "Curly", "Moe" ]
+--
+--   the result is a Lua table, e.g.
+--     { what = "books", count = 3 }
+--   or
+--     { "Larry", "Curly", "Moe" }
+--
+--
+--   The encode and decode routines accept an optional second argument,
+--   "etc", which is not used during encoding or decoding, but upon error
+--   is passed along to error handlers. It can be of any type (including nil).
+--
+--
+--
+-- ERROR HANDLING
+--
+--   With most errors during decoding, this code calls
+--
+--      JSON:onDecodeError(message, text, location, etc)
+--
+--   with a message about the error, and if known, the JSON text being
+--   parsed and the byte count where the problem was discovered. You can
+--   replace the default JSON:onDecodeError() with your own function.
+--
+--   The default onDecodeError() merely augments the message with data
+--   about the text and the location if known (and if a second 'etc'
+--   argument had been provided to decode(), its value is tacked onto the
+--   message as well), and then calls JSON.assert(), which itself defaults
+--   to Lua's built-in assert(), and can also be overridden.
+--
+--   For example, in an Adobe Lightroom plugin, you might use something like
+--
+--          function JSON:onDecodeError(message, text, location, etc)
+--             LrErrors.throwUserError("Internal Error: invalid JSON data")
+--          end
+--
+--   or even just
+--
+--          function JSON.assert(message)
+--             LrErrors.throwUserError("Internal Error: " .. message)
+--          end
+--
+--   If JSON:decode() is passed a nil, this is called instead:
+--
+--      JSON:onDecodeOfNilError(message, nil, nil, etc)
+--
+--   and if JSON:decode() is passed HTML instead of JSON, this is called:
+--
+--      JSON:onDecodeOfHTMLError(message, text, nil, etc)
+--
+--   The use of the fourth 'etc' argument allows stronger coordination
+--   between decoding and error reporting, especially when you provide your
+--   own error-handling routines. Continuing with the the Adobe Lightroom
+--   plugin example:
+--
+--          function JSON:onDecodeError(message, text, location, etc)
+--             local note = "Internal Error: invalid JSON data"
+--             if type(etc) = 'table' and etc.photo then
+--                note = note .. " while processing for " .. etc.photo:getFormattedMetadata('fileName')
+--             end
+--             LrErrors.throwUserError(note)
+--          end
+--
+--            :
+--            :
+--
+--          for i, photo in ipairs(photosToProcess) do
+--               :             
+--               :             
+--               local data = JSON:decode(someJsonText, { photo = photo })
+--               :             
+--               :             
+--          end
+--
+--
+--
+--
+--
+-- DECODING AND STRICT TYPES
+--
+--   Because both JSON objects and JSON arrays are converted to Lua tables,
+--   it's not normally possible to tell which original JSON type a
+--   particular Lua table was derived from, or guarantee decode-encode
+--   round-trip equivalency.
+--
+--   However, if you enable strictTypes, e.g.
+--
+--      JSON = assert(loadfile "JSON.lua")() --load the routines
+--      JSON.strictTypes = true
+--
+--   then the Lua table resulting from the decoding of a JSON object or
+--   JSON array is marked via Lua metatable, so that when re-encoded with
+--   JSON:encode() it ends up as the appropriate JSON type.
+--
+--   (This is not the default because other routines may not work well with
+--   tables that have a metatable set, for example, Lightroom API calls.)
+--
+--
+-- ENCODING (from a lua table to a JSON string)
+--
+--   JSON = assert(loadfile "JSON.lua")() -- one-time load of the routines
+--
+--   local raw_json_text    = JSON:encode(lua_table_or_value)
+--   local pretty_json_text = JSON:encode_pretty(lua_table_or_value) -- "pretty printed" version for human readability
+--   local custom_pretty    = JSON:encode(lua_table_or_value, etc, { pretty = true, indent = "|  ", align_keys = false })
+--
+--   On error during encoding, this code calls:
+--
+--     JSON:onEncodeError(message, etc)
+--
+--   which you can override in your local JSON object.
+--
+--   The 'etc' in the error call is the second argument to encode()
+--   and encode_pretty(), or nil if it wasn't provided.
+--
+--
+-- PRETTY-PRINTING
+--
+--   An optional third argument, a table of options, allows a bit of
+--   configuration about how the encoding takes place:
+--
+--     pretty = JSON:encode(val, etc, {
+--                                       pretty = true,      -- if false, no other options matter
+--                                       indent = "   ",     -- this provides for a three-space indent per nesting level
+--                                       align_keys = false, -- see below
+--                                     })
+--
+--   encode() and encode_pretty() are identical except that encode_pretty()
+--   provides a default options table if none given in the call:
+--
+--       { pretty = true, align_keys = false, indent = "  " }
+--
+--   For example, if
+--
+--      JSON:encode(data)
+--
+--   produces:
+--
+--      {"city":"Kyoto","climate":{"avg_temp":16,"humidity":"high","snowfall":"minimal"},"country":"Japan","wards":11}
+--
+--   then
+--
+--      JSON:encode_pretty(data)
+--
+--   produces:
+--
+--      {
+--        "city": "Kyoto",
+--        "climate": {
+--          "avg_temp": 16,
+--          "humidity": "high",
+--          "snowfall": "minimal"
+--        },
+--        "country": "Japan",
+--        "wards": 11
+--      }
+--
+--   The following three lines return identical results:
+--       JSON:encode_pretty(data)
+--       JSON:encode_pretty(data, nil, { pretty = true, align_keys = false, indent = "  " })
+--       JSON:encode       (data, nil, { pretty = true, align_keys = false, indent = "  " })
+--
+--   An example of setting your own indent string:
+--
+--     JSON:encode_pretty(data, nil, { pretty = true, indent = "|    " })
+--
+--   produces:
+--
+--      {
+--      |    "city": "Kyoto",
+--      |    "climate": {
+--      |    |    "avg_temp": 16,
+--      |    |    "humidity": "high",
+--      |    |    "snowfall": "minimal"
+--      |    },
+--      |    "country": "Japan",
+--      |    "wards": 11
+--      }
+--
+--   An example of setting align_keys to true:
+--
+--     JSON:encode_pretty(data, nil, { pretty = true, indent = "  ", align_keys = true })
+--  
+--   produces:
+--   
+--      {
+--           "city": "Kyoto",
+--        "climate": {
+--                     "avg_temp": 16,
+--                     "humidity": "high",
+--                     "snowfall": "minimal"
+--                   },
+--        "country": "Japan",
+--          "wards": 11
+--      }
+--
+--   which I must admit is kinda ugly, sorry. This was the default for
+--   encode_pretty() prior to version 20141223.14.
+--
+--
+--  AMBIGUOUS SITUATIONS DURING THE ENCODING
+--
+--   During the encode, if a Lua table being encoded contains both string
+--   and numeric keys, it fits neither JSON's idea of an object, nor its
+--   idea of an array. To get around this, when any string key exists (or
+--   when non-positive numeric keys exist), numeric keys are converted to
+--   strings.
+--
+--   For example, 
+--     JSON:encode({ "one", "two", "three", SOMESTRING = "some string" }))
+--   produces the JSON object
+--     {"1":"one","2":"two","3":"three","SOMESTRING":"some string"}
+--
+--   To prohibit this conversion and instead make it an error condition, set
+--      JSON.noKeyConversion = true
+--
+
+
+
+
+--
+-- SUMMARY OF METHODS YOU CAN OVERRIDE IN YOUR LOCAL LUA JSON OBJECT
+--
+--    assert
+--    onDecodeError
+--    onDecodeOfNilError
+--    onDecodeOfHTMLError
+--    onEncodeError
+--
+--  If you want to create a separate Lua JSON object with its own error handlers,
+--  you can reload JSON.lua or use the :new() method.
+--
+---------------------------------------------------------------------------
+
+local default_pretty_indent  = "  "
+local default_pretty_options = { pretty = true, align_keys = false, indent = default_pretty_indent }
+
+local isArray  = { __tostring = function() return "JSON array"  end }    isArray.__index  = isArray
+local isObject = { __tostring = function() return "JSON object" end }    isObject.__index = isObject
+
+
+function OBJDEF:newArray(tbl)
+   return setmetatable(tbl or {}, isArray)
+end
+
+function OBJDEF:newObject(tbl)
+   return setmetatable(tbl or {}, isObject)
+end
+
+local function unicode_codepoint_as_utf8(codepoint)
+   --
+   -- codepoint is a number
+   --
+   if codepoint <= 127 then
+      return string.char(codepoint)
+
+   elseif codepoint <= 2047 then
+      --
+      -- 110yyyxx 10xxxxxx         <-- useful notation from http://en.wikipedia.org/wiki/Utf8
+      --
+      local highpart = math.floor(codepoint / 0x40)
+      local lowpart  = codepoint - (0x40 * highpart)
+      return string.char(0xC0 + highpart,
+                         0x80 + lowpart)
+
+   elseif codepoint <= 65535 then
+      --
+      -- 1110yyyy 10yyyyxx 10xxxxxx
+      --
+      local highpart  = math.floor(codepoint / 0x1000)
+      local remainder = codepoint - 0x1000 * highpart
+      local midpart   = math.floor(remainder / 0x40)
+      local lowpart   = remainder - 0x40 * midpart
+
+      highpart = 0xE0 + highpart
+      midpart  = 0x80 + midpart
+      lowpart  = 0x80 + lowpart
+
+      --
+      -- Check for an invalid character (thanks Andy R. at Adobe).
+      -- See table 3.7, page 93, in http://www.unicode.org/versions/Unicode5.2.0/ch03.pdf#G28070
+      --
+      if ( highpart == 0xE0 and midpart < 0xA0 ) or
+         ( highpart == 0xED and midpart > 0x9F ) or
+         ( highpart == 0xF0 and midpart < 0x90 ) or
+         ( highpart == 0xF4 and midpart > 0x8F )
+      then
+         return "?"
+      else
+         return string.char(highpart,
+                            midpart,
+                            lowpart)
+      end
+
+   else
+      --
+      -- 11110zzz 10zzyyyy 10yyyyxx 10xxxxxx
+      --
+      local highpart  = math.floor(codepoint / 0x40000)
+      local remainder = codepoint - 0x40000 * highpart
+      local midA      = math.floor(remainder / 0x1000)
+      remainder       = remainder - 0x1000 * midA
+      local midB      = math.floor(remainder / 0x40)
+      local lowpart   = remainder - 0x40 * midB
+
+      return string.char(0xF0 + highpart,
+                         0x80 + midA,
+                         0x80 + midB,
+                         0x80 + lowpart)
+   end
+end
+
+function OBJDEF:onDecodeError(message, text, location, etc)
+   if text then
+      if location then
+         message = string.format("%s at char %d of: %s", message, location, text)
+      else
+         message = string.format("%s: %s", message, text)
+      end
+   end
+
+   if etc ~= nil then
+      message = message .. " (" .. OBJDEF:encode(etc) .. ")"
+   end
+
+   if self.assert then
+      self.assert(false, message)
+   else
+      assert(false, message)
+   end
+end
+
+OBJDEF.onDecodeOfNilError  = OBJDEF.onDecodeError
+OBJDEF.onDecodeOfHTMLError = OBJDEF.onDecodeError
+
+function OBJDEF:onEncodeError(message, etc)
+   if etc ~= nil then
+      message = message .. " (" .. OBJDEF:encode(etc) .. ")"
+   end
+
+   if self.assert then
+      self.assert(false, message)
+   else
+      assert(false, message)
+   end
+end
+
+local function grok_number(self, text, start, etc)
+   --
+   -- Grab the integer part
+   --
+   local integer_part = text:match('^-?[1-9]%d*', start)
+                     or text:match("^-?0",        start)
+
+   if not integer_part then
+      self:onDecodeError("expected number", text, start, etc)
+   end
+
+   local i = start + integer_part:len()
+
+   --
+   -- Grab an optional decimal part
+   --
+   local decimal_part = text:match('^%.%d+', i) or ""
+
+   i = i + decimal_part:len()
+
+   --
+   -- Grab an optional exponential part
+   --
+   local exponent_part = text:match('^[eE][-+]?%d+', i) or ""
+
+   i = i + exponent_part:len()
+
+   local full_number_text = integer_part .. decimal_part .. exponent_part
+   local as_number = tonumber(full_number_text)
+
+   if not as_number then
+      self:onDecodeError("bad number", text, start, etc)
+   end
+
+   return as_number, i
+end
+
+
+local function grok_string(self, text, start, etc)
+
+   if text:sub(start,start) ~= '"' then
+      self:onDecodeError("expected string's opening quote", text, start, etc)
+   end
+
+   local i = start + 1 -- +1 to bypass the initial quote
+   local text_len = text:len()
+   local VALUE = ""
+   while i <= text_len do
+      local c = text:sub(i,i)
+      if c == '"' then
+         return VALUE, i + 1
+      end
+      if c ~= '\\' then
+         VALUE = VALUE .. c
+         i = i + 1
+      elseif text:match('^\\b', i) then
+         VALUE = VALUE .. "\b"
+         i = i + 2
+      elseif text:match('^\\f', i) then
+         VALUE = VALUE .. "\f"
+         i = i + 2
+      elseif text:match('^\\n', i) then
+         VALUE = VALUE .. "\n"
+         i = i + 2
+      elseif text:match('^\\r', i) then
+         VALUE = VALUE .. "\r"
+         i = i + 2
+      elseif text:match('^\\t', i) then
+         VALUE = VALUE .. "\t"
+         i = i + 2
+      else
+         local hex = text:match('^\\u([0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF])', i)
+         if hex then
+            i = i + 6 -- bypass what we just read
+
+            -- We have a Unicode codepoint. It could be standalone, or if in the proper range and
+            -- followed by another in a specific range, it'll be a two-code surrogate pair.
+            local codepoint = tonumber(hex, 16)
+            if codepoint >= 0xD800 and codepoint <= 0xDBFF then
+               -- it's a hi surrogate... see whether we have a following low
+               local lo_surrogate = text:match('^\\u([dD][cdefCDEF][0123456789aAbBcCdDeEfF][0123456789aAbBcCdDeEfF])', i)
+               if lo_surrogate then
+                  i = i + 6 -- bypass the low surrogate we just read
+                  codepoint = 0x2400 + (codepoint - 0xD800) * 0x400 + tonumber(lo_surrogate, 16)
+               else
+                  -- not a proper low, so we'll just leave the first codepoint as is and spit it out.
+               end
+            end
+            VALUE = VALUE .. unicode_codepoint_as_utf8(codepoint)
+
+         else
+
+            -- just pass through what's escaped
+            VALUE = VALUE .. text:match('^\\(.)', i)
+            i = i + 2
+         end
+      end
+   end
+
+   self:onDecodeError("unclosed string", text, start, etc)
+end
+
+local function skip_whitespace(text, start)
+
+   local _, match_end = text:find("^[ \n\r\t]+", start) -- [http://www.ietf.org/rfc/rfc4627.txt] Section 2
+   if match_end then
+      return match_end + 1
+   else
+      return start
+   end
+end
+
+local grok_one -- assigned later
+
+local function grok_object(self, text, start, etc)
+   if text:sub(start,start) ~= '{' then
+      self:onDecodeError("expected '{'", text, start, etc)
+   end
+
+   local i = skip_whitespace(text, start + 1) -- +1 to skip the '{'
+
+   local VALUE = self.strictTypes and self:newObject { } or { }
+
+   if text:sub(i,i) == '}' then
+      return VALUE, i + 1
+   end
+   local text_len = text:len()
+   while i <= text_len do
+      local key, new_i = grok_string(self, text, i, etc)
+
+      i = skip_whitespace(text, new_i)
+
+      if text:sub(i, i) ~= ':' then
+         self:onDecodeError("expected colon", text, i, etc)
+      end
+
+      i = skip_whitespace(text, i + 1)
+
+      local new_val, new_i = grok_one(self, text, i)
+
+      VALUE[key] = new_val
+
+      --
+      -- Expect now either '}' to end things, or a ',' to allow us to continue.
+      --
+      i = skip_whitespace(text, new_i)
+
+      local c = text:sub(i,i)
+
+      if c == '}' then
+         return VALUE, i + 1
+      end
+
+      if text:sub(i, i) ~= ',' then
+         self:onDecodeError("expected comma or '}'", text, i, etc)
+      end
+
+      i = skip_whitespace(text, i + 1)
+   end
+
+   self:onDecodeError("unclosed '{'", text, start, etc)
+end
+
+local function grok_array(self, text, start, etc)
+   if text:sub(start,start) ~= '[' then
+      self:onDecodeError("expected '['", text, start, etc)
+   end
+
+   local i = skip_whitespace(text, start + 1) -- +1 to skip the '['
+   local VALUE = self.strictTypes and self:newArray { } or { }
+   if text:sub(i,i) == ']' then
+      return VALUE, i + 1
+   end
+
+   local VALUE_INDEX = 1
+
+   local text_len = text:len()
+   while i <= text_len do
+      local val, new_i = grok_one(self, text, i)
+
+      -- can't table.insert(VALUE, val) here because it's a no-op if val is nil
+      VALUE[VALUE_INDEX] = val
+      VALUE_INDEX = VALUE_INDEX + 1
+
+      i = skip_whitespace(text, new_i)
+
+      --
+      -- Expect now either ']' to end things, or a ',' to allow us to continue.
+      --
+      local c = text:sub(i,i)
+      if c == ']' then
+         return VALUE, i + 1
+      end
+      if text:sub(i, i) ~= ',' then
+         self:onDecodeError("expected comma or '['", text, i, etc)
+      end
+      i = skip_whitespace(text, i + 1)
+   end
+   self:onDecodeError("unclosed '['", text, start, etc)
+end
+
+
+grok_one = function(self, text, start, etc)
+   -- Skip any whitespace
+   start = skip_whitespace(text, start)
+
+   if start > text:len() then
+      self:onDecodeError("unexpected end of string", text, nil, etc)
+   end
+
+   if text:find('^"', start) then
+      return grok_string(self, text, start, etc)
+
+   elseif text:find('^[-0123456789 ]', start) then
+      return grok_number(self, text, start, etc)
+
+   elseif text:find('^%{', start) then
+      return grok_object(self, text, start, etc)
+
+   elseif text:find('^%[', start) then
+      return grok_array(self, text, start, etc)
+
+   elseif text:find('^true', start) then
+      return true, start + 4
+
+   elseif text:find('^false', start) then
+      return false, start + 5
+
+   elseif text:find('^null', start) then
+      return nil, start + 4
+
+   else
+      self:onDecodeError("can't parse JSON", text, start, etc)
+   end
+end
+
+function OBJDEF:decode(text, etc)
+   if type(self) ~= 'table' or self.__index ~= OBJDEF then
+      OBJDEF:onDecodeError("JSON:decode must be called in method format", nil, nil, etc)
+   end
+
+   if text == nil then
+      self:onDecodeOfNilError(string.format("nil passed to JSON:decode()"), nil, nil, etc)
+   elseif type(text) ~= 'string' then
+      self:onDecodeError(string.format("expected string argument to JSON:decode(), got %s", type(text)), nil, nil, etc)
+   end
+
+   if text:match('^%s*$') then
+      return nil
+   end
+
+   if text:match('^%s*<') then
+      -- Can't be JSON... we'll assume it's HTML
+      self:onDecodeOfHTMLError(string.format("html passed to JSON:decode()"), text, nil, etc)
+   end
+
+   --
+   -- Ensure that it's not UTF-32 or UTF-16.
+   -- Those are perfectly valid encodings for JSON (as per RFC 4627 section 3),
+   -- but this package can't handle them.
+   --
+   if text:sub(1,1):byte() == 0 or (text:len() >= 2 and text:sub(2,2):byte() == 0) then
+      self:onDecodeError("JSON package groks only UTF-8, sorry", text, nil, etc)
+   end
+
+   local success, value = pcall(grok_one, self, text, 1, etc)
+
+   if success then
+      return value
+   else
+      -- if JSON:onDecodeError() didn't abort out of the pcall, we'll have received the error message here as "value", so pass it along as an assert.
+      if self.assert then
+         self.assert(false, value)
+      else
+         assert(false, value)
+      end
+      -- and if we're still here, return a nil and throw the error message on as a second arg
+      return nil, value
+   end
+end
+
+local function backslash_replacement_function(c)
+   if c == "\n" then
+      return "\\n"
+   elseif c == "\r" then
+      return "\\r"
+   elseif c == "\t" then
+      return "\\t"
+   elseif c == "\b" then
+      return "\\b"
+   elseif c == "\f" then
+      return "\\f"
+   elseif c == '"' then
+      return '\\"'
+   elseif c == '\\' then
+      return '\\\\'
+   else
+      return string.format("\\u%04x", c:byte())
+   end
+end
+
+local chars_to_be_escaped_in_JSON_string
+   = '['
+   ..    '"'    -- class sub-pattern to match a double quote
+   ..    '%\\'  -- class sub-pattern to match a backslash
+   ..    '%z'   -- class sub-pattern to match a null
+   ..    '\001' .. '-' .. '\031' -- class sub-pattern to match control characters
+   .. ']'
+
+local function json_string_literal(value)
+   local newval = value:gsub(chars_to_be_escaped_in_JSON_string, backslash_replacement_function)
+   return '"' .. newval .. '"'
+end
+
+local function object_or_array(self, T, etc)
+   --
+   -- We need to inspect all the keys... if there are any strings, we'll convert to a JSON
+   -- object. If there are only numbers, it's a JSON array.
+   --
+   -- If we'll be converting to a JSON object, we'll want to sort the keys so that the
+   -- end result is deterministic.
+   --
+   local string_keys = { }
+   local number_keys = { }
+   local number_keys_must_be_strings = false
+   local maximum_number_key
+
+   for key in pairs(T) do
+      if type(key) == 'string' then
+         table.insert(string_keys, key)
+      elseif type(key) == 'number' then
+         table.insert(number_keys, key)
+         if key <= 0 or key >= math.huge then
+            number_keys_must_be_strings = true
+         elseif not maximum_number_key or key > maximum_number_key then
+            maximum_number_key = key
+         end
+      else
+         self:onEncodeError("can't encode table with a key of type " .. type(key), etc)
+      end
+   end
+
+   if #string_keys == 0 and not number_keys_must_be_strings then
+      --
+      -- An empty table, or a numeric-only array
+      --
+      if #number_keys > 0 then
+         return nil, maximum_number_key -- an array
+      elseif tostring(T) == "JSON array" then
+         return nil
+      elseif tostring(T) == "JSON object" then
+         return { }
+      else
+         -- have to guess, so we'll pick array, since empty arrays are likely more common than empty objects
+         return nil
+      end
+   end
+
+   table.sort(string_keys)
+
+   local map
+   if #number_keys > 0 then
+      --
+      -- If we're here then we have either mixed string/number keys, or numbers inappropriate for a JSON array
+      -- It's not ideal, but we'll turn the numbers into strings so that we can at least create a JSON object.
+      --
+
+      if self.noKeyConversion then
+         self:onEncodeError("a table with both numeric and string keys could be an object or array; aborting", etc)
+      end
+
+      --
+      -- Have to make a shallow copy of the source table so we can remap the numeric keys to be strings
+      --
+      map = { }
+      for key, val in pairs(T) do
+         map[key] = val
+      end
+
+      table.sort(number_keys)
+
+      --
+      -- Throw numeric keys in there as strings
+      --
+      for _, number_key in ipairs(number_keys) do
+         local string_key = tostring(number_key)
+         if map[string_key] == nil then
+            table.insert(string_keys , string_key)
+            map[string_key] = T[number_key]
+         else
+            self:onEncodeError("conflict converting table with mixed-type keys into a JSON object: key " .. number_key .. " exists both as a string and a number.", etc)
+         end
+      end
+   end
+
+   return string_keys, nil, map
+end
+
+--
+-- Encode
+--
+-- 'options' is nil, or a table with possible keys:
+--    pretty            -- if true, return a pretty-printed version
+--    indent            -- a string (usually of spaces) used to indent each nested level
+--    align_keys        -- if true, align all the keys when formatting a table
+--
+local encode_value -- must predeclare because it calls itself
+function encode_value(self, value, parents, etc, options, indent)
+
+   if value == nil then
+      return 'null'
+
+   elseif type(value) == 'string' then
+      return json_string_literal(value)
+
+   elseif type(value) == 'number' then
+      if value ~= value then
+         --
+         -- NaN (Not a Number).
+         -- JSON has no NaN, so we have to fudge the best we can. This should really be a package option.
+         --
+         return "null"
+      elseif value >= math.huge then
+         --
+         -- Positive infinity. JSON has no INF, so we have to fudge the best we can. This should
+         -- really be a package option. Note: at least with some implementations, positive infinity
+         -- is both ">= math.huge" and "<= -math.huge", which makes no sense but that's how it is.
+         -- Negative infinity is properly "<= -math.huge". So, we must be sure to check the ">="
+         -- case first.
+         --
+         return "1e+9999"
+      elseif value <= -math.huge then
+         --
+         -- Negative infinity.
+         -- JSON has no INF, so we have to fudge the best we can. This should really be a package option.
+         --
+         return "-1e+9999"
+      else
+         return tostring(value)
+      end
+
+   elseif type(value) == 'boolean' then
+      return tostring(value)
+
+   elseif type(value) ~= 'table' then
+      self:onEncodeError("can't convert " .. type(value) .. " to JSON", etc)
+
+   else
+      --
+      -- A table to be converted to either a JSON object or array.
+      --
+      local T = value
+
+      if type(options) ~= 'table' then
+         options = {}
+      end
+      if type(indent) ~= 'string' then
+         indent = ""
+      end
+
+      if parents[T] then
+         self:onEncodeError("table " .. tostring(T) .. " is a child of itself", etc)
+      else
+         parents[T] = true
+      end
+
+      local result_value
+
+      local object_keys, maximum_number_key, map = object_or_array(self, T, etc)
+      if maximum_number_key then
+         --
+         -- An array...
+         --
+         local ITEMS = { }
+         for i = 1, maximum_number_key do
+            table.insert(ITEMS, encode_value(self, T[i], parents, etc, options, indent))
+         end
+
+         if options.pretty then
+            result_value = "[ " .. table.concat(ITEMS, ", ") .. " ]"
+         else
+            result_value = "["  .. table.concat(ITEMS, ",")  .. "]"
+         end
+
+      elseif object_keys then
+         --
+         -- An object
+         --
+         local TT = map or T
+
+         if options.pretty then
+
+            local KEYS = { }
+            local max_key_length = 0
+            for _, key in ipairs(object_keys) do
+               local encoded = encode_value(self, tostring(key), parents, etc, options, indent)
+               if options.align_keys then
+                  max_key_length = math.max(max_key_length, #encoded)
+               end
+               table.insert(KEYS, encoded)
+            end
+            local key_indent = indent .. tostring(options.indent or "")
+            local subtable_indent = key_indent .. string.rep(" ", max_key_length) .. (options.align_keys and "  " or "")
+            local FORMAT = "%s%" .. string.format("%d", max_key_length) .. "s: %s"
+
+            local COMBINED_PARTS = { }
+            for i, key in ipairs(object_keys) do
+               local encoded_val = encode_value(self, TT[key], parents, etc, options, subtable_indent)
+               table.insert(COMBINED_PARTS, string.format(FORMAT, key_indent, KEYS[i], encoded_val))
+            end
+            result_value = "{\n" .. table.concat(COMBINED_PARTS, ",\n") .. "\n" .. indent .. "}"
+
+         else
+
+            local PARTS = { }
+            for _, key in ipairs(object_keys) do
+               local encoded_val = encode_value(self, TT[key],       parents, etc, options, indent)
+               local encoded_key = encode_value(self, tostring(key), parents, etc, options, indent)
+               table.insert(PARTS, string.format("%s:%s", encoded_key, encoded_val))
+            end
+            result_value = "{" .. table.concat(PARTS, ",") .. "}"
+
+         end
+      else
+         --
+         -- An empty array/object... we'll treat it as an array, though it should really be an option
+         --
+         result_value = "[]"
+      end
+
+      parents[T] = false
+      return result_value
+   end
+end
+
+
+function OBJDEF:encode(value, etc, options)
+   if type(self) ~= 'table' or self.__index ~= OBJDEF then
+      OBJDEF:onEncodeError("JSON:encode must be called in method format", etc)
+   end
+   return encode_value(self, value, {}, etc, options or nil)
+end
+
+function OBJDEF:encode_pretty(value, etc, options)
+   if type(self) ~= 'table' or self.__index ~= OBJDEF then
+      OBJDEF:onEncodeError("JSON:encode_pretty must be called in method format", etc)
+   end
+   return encode_value(self, value, {}, etc, options or default_pretty_options)
+end
+
+function OBJDEF.__tostring()
+   return "JSON encode/decode package"
+end
+
+OBJDEF.__index = OBJDEF
+
+function OBJDEF:new(args)
+   local new = { }
+
+   if args then
+      for key, val in pairs(args) do
+         new[key] = val
+      end
+   end
+
+   return setmetatable(new, OBJDEF)
+end
+
+return OBJDEF:new()
+
+--
+-- Version history:
+--
+--   20141223.14   The encode_pretty() routine produced fine results for small datasets, but isn't really
+--                 appropriate for anything large, so with help from Alex Aulbach I've made the encode routines
+--                 more flexible, and changed the default encode_pretty() to be more generally useful.
+--
+--                 Added a third 'options' argument to the encode() and encode_pretty() routines, to control
+--                 how the encoding takes place.
+--
+--                 Updated docs to add assert() call to the loadfile() line, just as good practice so that
+--                 if there is a problem loading JSON.lua, the appropriate error message will percolate up.
+--
+--   20140920.13   Put back (in a way that doesn't cause warnings about unused variables) the author string,
+--                 so that the source of the package, and its version number, are visible in compiled copies.
+--
+--   20140911.12   Minor lua cleanup.
+--                 Fixed internal reference to 'JSON.noKeyConversion' to reference 'self' instead of 'JSON'.
+--                 (Thanks to SmugMug's David Parry for these.)
+--
+--   20140418.11   JSON nulls embedded within an array were being ignored, such that
+--                     ["1",null,null,null,null,null,"seven"],
+--                 would return
+--                     {1,"seven"}
+--                 It's now fixed to properly return
+--                     {1, nil, nil, nil, nil, nil, "seven"}
+--                 Thanks to "haddock" for catching the error.
+--
+--   20140116.10   The user's JSON.assert() wasn't always being used. Thanks to "blue" for the heads up.
+--
+--   20131118.9    Update for Lua 5.3... it seems that tostring(2/1) produces "2.0" instead of "2",
+--                 and this caused some problems.
+--
+--   20131031.8    Unified the code for encode() and encode_pretty(); they had been stupidly separate,
+--                 and had of course diverged (encode_pretty didn't get the fixes that encode got, so
+--                 sometimes produced incorrect results; thanks to Mattie for the heads up).
+--
+--                 Handle encoding tables with non-positive numeric keys (unlikely, but possible).
+--
+--                 If a table has both numeric and string keys, or its numeric keys are inappropriate
+--                 (such as being non-positive or infinite), the numeric keys are turned into
+--                 string keys appropriate for a JSON object. So, as before,
+--                         JSON:encode({ "one", "two", "three" })
+--                 produces the array
+--                         ["one","two","three"]
+--                 but now something with mixed key types like
+--                         JSON:encode({ "one", "two", "three", SOMESTRING = "some string" }))
+--                 instead of throwing an error produces an object:
+--                         {"1":"one","2":"two","3":"three","SOMESTRING":"some string"}
+--
+--                 To maintain the prior throw-an-error semantics, set
+--                      JSON.noKeyConversion = true
+--                 
+--   20131004.7    Release under a Creative Commons CC-BY license, which I should have done from day one, sorry.
+--
+--   20130120.6    Comment update: added a link to the specific page on my blog where this code can
+--                 be found, so that folks who come across the code outside of my blog can find updates
+--                 more easily.
+--
+--   20111207.5    Added support for the 'etc' arguments, for better error reporting.
+--
+--   20110731.4    More feedback from David Kolf on how to make the tests for Nan/Infinity system independent.
+--
+--   20110730.3    Incorporated feedback from David Kolf at http://lua-users.org/wiki/JsonModules:
+--
+--                   * When encoding lua for JSON, Sparse numeric arrays are now handled by
+--                     spitting out full arrays, such that
+--                        JSON:encode({"one", "two", [10] = "ten"})
+--                     returns
+--                        ["one","two",null,null,null,null,null,null,null,"ten"]
+--
+--                     In 20100810.2 and earlier, only up to the first non-null value would have been retained.
+--
+--                   * When encoding lua for JSON, numeric value NaN gets spit out as null, and infinity as "1+e9999".
+--                     Version 20100810.2 and earlier created invalid JSON in both cases.
+--
+--                   * Unicode surrogate pairs are now detected when decoding JSON.
+--
+--   20100810.2    added some checking to ensure that an invalid Unicode character couldn't leak in to the UTF-8 encoding
+--
+--   20100731.1    initial public release
+--
diff --git a/mediawiki.lrdevplugin/MediaWikiApi.lua b/mediawiki.lrdevplugin/MediaWikiApi.lua
index de432a7..e54e973 100755
--- a/mediawiki.lrdevplugin/MediaWikiApi.lua
+++ b/mediawiki.lrdevplugin/MediaWikiApi.lua
@@ -18,12 +18,14 @@ local LrHttp = import 'LrHttp'
 local LrPathUtils = import 'LrPathUtils'
 local LrXml = import 'LrXml'
 
+local JSON = require 'JSON'
 local Info = require 'Info'
 local MediaWikiUtils = require 'MediaWikiUtils'
 
 local MediaWikiApi = {
 	userAgent = string.format('LrMediaWiki %d.%d', Info.VERSION.major, Info.VERSION.minor),
 	apiPath = nil,
+	githubApiVersion = 'https://api.github.com/repos/robinkrahl/LrMediaWiki/releases',
 }
 
 --- URL-encode a string according to RFC 3986.
@@ -53,7 +55,7 @@ function MediaWikiApi.createRequestBody(arguments)
 		end
 		body = body .. MediaWikiApi.urlEncode(key) .. '=' .. MediaWikiApi.urlEncode(value)
 	end
-	return body
+	return body or ''
 end
 
 function MediaWikiApi.parseXmlDom(xmlDomInstance)
@@ -76,30 +78,27 @@ function MediaWikiApi.parseXmlDom(xmlDomInstance)
 	return value
 end
 
-function MediaWikiApi.performRequest(arguments)
-	arguments.format = 'xml'
+function MediaWikiApi.performHttpRequest(path, arguments, requestHeaders, post)
 	local requestBody = MediaWikiApi.createRequestBody(arguments)
-	local requestHeaders = {
-		{
-			field = 'User-Agent',
-			value = MediaWikiApi.userAgent,
-		},
-		{
-			field = 'Content-Type',
-			value = 'application/x-www-form-urlencoded',
-		},
-	}
-	MediaWikiUtils.trace('Performing API request');
+
+	MediaWikiUtils.trace('Performing HTTP request');
+	MediaWikiUtils.trace('Path:')
+	MediaWikiUtils.trace(path)
 	MediaWikiUtils.trace('Request body:');
 	MediaWikiUtils.trace(requestBody);
 
-	local resultBody, resultHeaders = LrHttp.post(MediaWikiApi.apiPath, requestBody, requestHeaders)
+	local resultBody, resultHeaders
+	if post then
+		resultBody, resultHeaders = LrHttp.post(path, requestBody, requestHeaders)
+	else
+		resultBody, resultHeaders = LrHttp.get(path .. '?' .. requestBody, requestHeaders)
+	end
 
 	MediaWikiUtils.trace('Result status:');
 	MediaWikiUtils.trace(resultHeaders.status);
 
 	if not resultHeaders.status then
-		LrErrors.throwUserError(LOC('$$$/LrMediaWiki/Api/NoConnection=Cannot connect to the MediaWiki API.'))
+		LrErrors.throwUserError(LOC('$$$/LrMediaWiki/Api/NoConnection=No network connection.'))
 	elseif resultHeaders.status ~= 200 then
 		LrErrors.throwUserError(LOC('$$$/LrMediaWiki/Api/HttpError=Received HTTP status ^1.', resultHeaders.status))
 	end
@@ -107,6 +106,23 @@ function MediaWikiApi.performRequest(arguments)
 	MediaWikiUtils.trace('Result body:');
 	MediaWikiUtils.trace(resultBody);
 
+	return resultBody
+end
+
+function MediaWikiApi.performRequest(arguments)
+	arguments.format = 'xml'
+	local requestHeaders = {
+		{
+			field = 'User-Agent',
+			value = MediaWikiApi.userAgent,
+		},
+		{
+			field = 'Content-Type',
+			value = 'application/x-www-form-urlencoded',
+		},
+	}
+
+	local resultBody = MediaWikiApi.performHttpRequest(MediaWikiApi.apiPath, arguments, requestHeaders, true)
 	local resultXml = MediaWikiApi.parseXmlDom(LrXml.parseXml(resultBody))
 	if resultXml.error then
 		LrErrors.throwUserError(LOC('$$$/LrMediaWiki/Api/MediaWikiError=The MediaWiki error ^1 occured: ^2', resultXml.error.code, resultXml.error.info))
@@ -114,6 +130,22 @@ function MediaWikiApi.performRequest(arguments)
 	return resultXml
 end
 
+function MediaWikiApi.getCurrentPluginVersion()
+	local requestHeaders = {
+		{
+			field = 'User-Agent',
+			value = MediaWikiApi.userAgent,
+		},
+	}
+	local resultBody = MediaWikiApi.performHttpRequest(MediaWikiApi.githubApiVersion, {}, requestHeaders, false)
+	local resultJson = JSON:decode(resultBody)
+	local firstKey = MediaWikiUtils.getFirstKey(resultJson)
+	if firstKey ~= nil then
+		return resultJson[firstKey].tag_name
+	end
+	return nil
+end
+
 function MediaWikiApi.login(username, password, token)
 	local arguments = {
 		action = 'login',
diff --git a/mediawiki.lrdevplugin/MediaWikiInit.lua b/mediawiki.lrdevplugin/MediaWikiInit.lua
new file mode 100644
index 0000000..d775930
--- /dev/null
+++ b/mediawiki.lrdevplugin/MediaWikiInit.lua
@@ -0,0 +1,33 @@
+-- This file is part of the LrMediaWiki project and distributed under the terms

+-- of the MIT license (see LICENSE.txt file in the project root directory or

+-- [0]).  See [1] for more information about LrMediaWiki.

+--

+-- Copyright (C) 2015 by the LrMediaWiki team (see CREDITS.txt file in the

+-- project root directory or [2])

+--

+-- [0]  <https://raw.githubusercontent.com/robinkrahl/LrMediaWiki/master/LICENSE.txt>

+-- [1]  <https://commons.wikimedia.org/wiki/Commons:LrMediaWiki>

+-- [2]  <https://raw.githubusercontent.com/robinkrahl/LrMediaWiki/master/CREDITS.txt>

+

+-- Code status:

+-- doc:   missing

+-- i18n:  complete

+

+local LrDialogs = import 'LrDialogs'

+local LrTasks = import 'LrTasks'

+

+local MediaWikiApi = require 'MediaWikiApi'

+local MediaWikiUtils = require 'MediaWikiUtils'

+

+if MediaWikiUtils.getCheckVersion() then

+  LrTasks.startAsyncTask(function()

+    local currentVersion = MediaWikiApi.getCurrentPluginVersion()

+    if currentVersion ~= nil then

+      MediaWikiUtils.trace('Current version of LrMediaWiki is: ' .. currentVersion)

+      if currentVersion ~= 'v' .. MediaWikiUtils.getVersionString() then

+        -- new version available!

+        LrDialogs.message(LOC '$$$/LrMediaWiki/Init/Version/Message=New version available', LOC('$$$/LrMediaWiki/Init/Version/Info=Please update to LrMediaWiki ^1.', currentVersion), 'info')

+      end

+    end

+  end)

+end

diff --git a/mediawiki.lrdevplugin/MediaWikiPluginInfoProvider.lua b/mediawiki.lrdevplugin/MediaWikiPluginInfoProvider.lua
index ca87904..1f2f66a 100644
--- a/mediawiki.lrdevplugin/MediaWikiPluginInfoProvider.lua
+++ b/mediawiki.lrdevplugin/MediaWikiPluginInfoProvider.lua
@@ -24,11 +24,13 @@ local MediaWikiPluginInfoProvider = {}
 MediaWikiPluginInfoProvider.startDialog = function(propertyTable)

   propertyTable.logging = MediaWikiUtils.getLogging()

   propertyTable.create_snapshots = MediaWikiUtils.getCreateSnapshots()

+  propertyTable.check_version = MediaWikiUtils.getCheckVersion()

 end

 

 MediaWikiPluginInfoProvider.endDialog = function(propertyTable)

   MediaWikiUtils.setLogging(propertyTable.logging)

   MediaWikiUtils.setCreateSnapshots(propertyTable.create_snapshots)

+  MediaWikiUtils.setCheckVersion(propertyTable.check_version)

 end

 

 MediaWikiPluginInfoProvider.sectionsForBottomOfDialog = function(viewFactory, propertyTable)

@@ -65,6 +67,20 @@ MediaWikiPluginInfoProvider.sectionsForBottomOfDialog = function(viewFactory, pr
 					},

 

 					viewFactory:checkbox {

+						value = bind 'check_version',

+            title = LOC '$$$/LrMediaWiki/Section/Config/Version=Check for new plugin versions after Lightroom starts',

+					},

+				},

+

+				viewFactory:row {

+					spacing = viewFactory:label_spacing(),

+

+					viewFactory:static_text {

+						alignment = labelAlignment,

+						width = LrView.share "label_width",

+					},

+

+					viewFactory:checkbox {

 						value = bind 'logging',

             title = LOC '$$$/LrMediaWiki/Section/Config/Logging=Enable logging',

 					},

diff --git a/mediawiki.lrdevplugin/MediaWikiUtils.lua b/mediawiki.lrdevplugin/MediaWikiUtils.lua
index abde828..588121d 100644
--- a/mediawiki.lrdevplugin/MediaWikiUtils.lua
+++ b/mediawiki.lrdevplugin/MediaWikiUtils.lua
@@ -34,6 +34,13 @@ MediaWikiUtils.isStringEmpty = function(str)
 	return str == nil or string.match(str, '^%s*$') ~= nil

 end

 

+MediaWikiUtils.getFirstKey = function(table)

+  for key, value in pairs(table) do

+		return key

+	end

+  return nil

+end

+

 MediaWikiUtils.getVersionString = function()

     local str = Info.VERSION.major .. '.' .. Info.VERSION.minor

     if Info.VERSION.revision > 0 then

@@ -52,6 +59,14 @@ MediaWikiUtils.setCreateSnapshots = function(create_snapshot)
 	prefs.create_snapshot = create_snapshot

 end

 

+MediaWikiUtils.getCheckVersion = function()

+	return prefs.check_version or false

+end

+

+MediaWikiUtils.setCheckVersion = function(check_version)

+	prefs.check_version = check_version

+end

+

 MediaWikiUtils.getLogging = function()

 	return prefs.logging or false

 end

diff --git a/mediawiki.lrdevplugin/TranslatedStrings_de.txt b/mediawiki.lrdevplugin/TranslatedStrings_de.txt
index eee73b8..f4b8c33 100755
--- a/mediawiki.lrdevplugin/TranslatedStrings_de.txt
+++ b/mediawiki.lrdevplugin/TranslatedStrings_de.txt
@@ -1,6 +1,6 @@
 "$$$/LrMediaWiki/Api/HttpError=HTTP-Status ^1 erhalten."

 "$$$/LrMediaWiki/Api/MediaWikiError=Der MediaWiki-Fehler ^1 ist aufgetreten: ^2"

-"$$$/LrMediaWiki/Api/NoConnection=Kann keine Verbindung zur MediaWiki-API aufbauen."

+"$$$/LrMediaWiki/Api/NoConnection=Kann keine Netzwerkverbindung aufbauen."

 "$$$/LrMediaWiki/Export/DescriptionError=Fehler beim Lesen der Dateibeschreibung"

 "$$$/LrMediaWiki/Export/NoApiPath=Kein API-Pfad angegeben!"

 "$$$/LrMediaWiki/Export/NoAuthor=Kein Urheber angegeben!"

@@ -12,6 +12,8 @@
 "$$$/LrMediaWiki/Export/Progress/One=Exportiere ein Bild in ein MediaWiki"

 "$$$/LrMediaWiki/Export/Progress=Exportiere ^1 Bilder in ein MediaWiki"

 "$$$/LrMediaWiki/Export/Snapshot=MediaWiki-Export, ^1 ^2, ^3"

+"$$$/LrMediaWiki/Init/Version/Info=Bitte aktualisiere LrMediaWiki auf die neue Version ^1."

+"$$$/LrMediaWiki/Init/Version/Message=Neue Version verfügbar"

 "$$$/LrMediaWiki/Interface/Internal/NotLoggedIn=Interner Fehler: vor dem Upload nicht angemeldet."

 "$$$/LrMediaWiki/Interface/InUse/Cancel=Abbrechen"

 "$$$/LrMediaWiki/Interface/InUse/Details=Es gibt bereits eine Datei mit dem Namen ^1. Überschreiben? (Die Dateibeschreibung wird nicht verändert.)"

@@ -39,6 +41,7 @@
 "$$$/LrMediaWiki/Section/Config/Logging/Warning=Achtung:"

 "$$$/LrMediaWiki/Section/Config/Snapshots=Beim Export einen Schnappschuss anlegen"

 "$$$/LrMediaWiki/Section/Config/Title=Einstellungen"

+"$$$/LrMediaWiki/Section/Config/Version=Suche nach neuen Pluginversionen, wenn Lightroom startet"

 "$$$/LrMediaWiki/Section/Licensing/Author=Urheber"

 "$$$/LrMediaWiki/Section/Licensing/Categories/Details=mit ; trennen"

 "$$$/LrMediaWiki/Section/Licensing/Categories=Kategorien"